Oil burner



Aug. 7, 1928. 1,679,633

w. l.. slx

OIL BURNER Filed Jan. 21, 1926 f, 34 ff; ///f/O l;

Il-NyENToR y /W//W//x. 7 4:/ ,II/,lll l ATTORNEY Patented Aug. 7, 1928.

UNITED@ STATES WILLIAM I..l SIX, or KANSAS CITY, MISSOURI.

oIL BURNER.

n Appnaauon mea January 21,' 192e.v` saria1 Na. 82,699.

My invention relates to oil burners and more particularly to an openretort burner to which oil is fed by gravity and 'there vapor-ized andmiXed "with air for supporting combustion, the principal object of theinvention being to adapt a burner of this type for thermostatic controlby eliminating the usual tendency of the burner to smoke or extinguishat low heat or when operating only at pilot capacity.

It is also an object of the invention to provide a burner of this typewherein a steady and even supply of vapor maybe maintained regardless ofthe feed.

In accomplishing these and other objects of the invention, I haveprovided improved details of structure, the preferred forms of which areillustrated in the accompanying drawings whereim" l Fig. 1 is aVerticahfsectionalperspective View of a burner embodying my invention.

Fig. 2 is a detail perspective view ofthe burner, showing the severalparts in spaced relation.

Referring more in detail to the drawings,

1 designates a lire bowl comprising a concavo-coi'ivei; bottom 2 andanupstanding peripheral wall 3, the latter having an out wardly andupwardly'sloping edge flange 2li, provided withlegs 5 for supporting thelire bowl from the grateor other support in the furnace in which theburner is installed, the legs 5 being preferably'integral with the lirebowl and providedrwith outwardly extending feet 6 having'threaded bosses7 carrying screws 8 by which the fire bowl may be leveled upon itssupport.

Cast concentrically with thebottom of the fire bowl is an upstandingboss`9 internally threaded as at 10 to receive a pipe 11 through whichoil is supplied to the lire bowl, the supply pipe being provided with acontrol valve 12 by which flow to the burner may be regulated,

Located concentrically of and above the fire bowl is a vaporizing plate13, having a ring boss 1li on its under face provided with ra dial ribsl5, which support the plate from the bottom of the fire bowl and spacethe plate from the bowl to form an oil reservoir 1G and channels 17,'through which oil may pass` from the reservoir. n n

The vaporizing plate 13 is centered on the fire bowl by downwardlyprojecting lugs 18, preferably integral with the plate and of suchlength and arrangement as to surround and engage the upstanding boss 9on the bottom of the bow i,

Il-have found that by maintaining a pool of oil in the yreservoir anddrawing supply for vaporization' from the pool instead of generating itin a coil or feed pipe, I am able to maintain a steadier andl moreuni-k` form flame, and that by generating in a wick there is lesstendency of the ,flame to become extinguished` than when .drawing vapordirectly from the body of oil. C on sequently, I separate the reservoirfrom the combustion chamber by the vaporizingplate 13 and insulate thevaporizing plate by a plate 19 of substantiallylthe same diameter as thevaporizing plate and spaced therefrom by a do'wnturned edge flange 20 onthe insulating plate to kmaintain a dead air space 21 between theplates. p

AThe insulating plate 19 vaporizing plate by aboss 22 cast integral withthe vaporizing' vplate and received in an opening 23 in the center ofthe insulating plate. f

The' wick before vreferred to constitutes a ringf24 which lies on thebottom of the fire bowl close about the edge of the vaporizing plate toreceive' oil orfvaporllowing out through the channels17, orbycapillaryattraction from the reservoir 16.

The burner is enclosed by a ring 25 supported on a ring plate 26 carriedby the furnace -grate (not shown) and spaced from the fire bowl toprovide an air passageway 27, the ring being notched, as' at 28,'to re.-

is centered on the ceive the supporting legs y5 of the firebowl, y .i

-m'aintain the ring in position and ypermit itV to rest firmly upon itssupport.

In order that'fcombustion supporting air:

may be deliveredffrom the passageway 27 downwardly and inta thin layerover 4the wick, I provide a deflecting ring 29 which is supported from aflange 30 cast on the inner surface of the ring, near its upper edge,the ring being provided with a downwardly and inwardly sloping "flange31 which is spaced from the fire bowl flange 4- to provide a Venturioutlet 32 so that air passing through the Venturi outlet not only mixeswith the vapor to forma proper feed mixture, but also drives the flameto the center of the fire bowl, insuring a thorough of the air andvapor.

. The burner is covered `by a plate 33, pref# erably of refractorymaterial andsupported centrally over the topof the fire bowl bycomminglingl lll) legs 34 which are preferably integral with the plateand rest upon bosses 35 on the air throat ring 29.

The air outlet throat may be adjusted to vary the volume of airAadmitted to the burner by regulating set screws 36, which are threadedthrough the ring 29 and bear upon the flange 30, so that the ring may beraised and lowered to vary the widthpo't the throat.

The lire bowl may be provided with an overflow outlet 37, preferablyformed in the flange l slightly above the normal level of the oil in thereservoir and the oil carried oil" through a pipe 38 that is screwedinto the flange in line with the outlet 37.

Vhile l have shown a manually operable valve 12 tor controlling supplyof oil to the reservoir, it is apparent that a thermostaticallycontrolled valve may be substituted without departing trointhe spirit otmy invention. j

In assembling the burner, the air throat ring 28 is placed over thegrate in the 'furnace so that air may be supplied to the burner throughits central opening. The lire bowl is then positioned on the plate 26and the screws S adjusted to level the bowl. After the ire bowl has beenleveled, the vaporizing plate 13 is placed therein with the lugs 18engaging the boss 9 on the floor ot the bowl. The insulating Yplate 19is then placed on top of the vaporizing plate and the wicking placedabout the periphery of the vaporizing plate to cover the outlet from thereservoir. The ring 25 may then be slipped over the fire bowlwith itsslotted portions engaging the feet of the fire bowl legs. The detlectingring 29 is then positioned inside of the ring 25 and the screws 36manipulated to adjust the air opening. rIhe flame spreading plate 33 ispositioned over the burner with the supporting legs resting on thebosses ol'v the del'lecting ring.

lVhen the burner is operated, the valve 12 is opened, permitting oil toflow by gravity into the lire bowl until it reaches a level about midwayof the horizontal diameter of the wick. A lighted paper is `then placedon top of the insulating plate 19 to ignite the oil in the wick, thewick taking up oil trom the reservoir by capillary attraction to replacethat which is consumed. 'After the vaporizing plate has become heated,

vaporization takes place in the space bespread outwardly against thewalls of theV furnace, the deflection insuring a mixture ot the fuelelements and substantially complete coinbustion'. j

then the space served by the burner has been heated to the desiredtemperature, the valve 12 may be closed to reduce flow of oil to theburner, or sulliciently to vdiscontinue vaporization by the' vaporizingplate.. ln the latter event, the oil is burned directly from the wickwith a short 'flame which serves as a pilot light to keep the vaporizingplate sutliciently hot to insure immediate vaporization when thevalve 12is again opened to admit a greater supply of oil, the wick ringstabilizing the pilot llame and insuring against its extinguishment bythe incoming air or irregularity of flow while the burner is at a lowheat.

Thus it will be seen that the burner may operate with a pilot flamesmall enough to prevent overheating in mild weather, but sullicient formaintaining vaporization, and without smoking.

What I claim and desire to secure by Letters Patent is An oil burnercomprising a bowl adapted for containing oil in fluid state, means tordelivering oil to the bowl, a plate covering the bowl and spacedtherefrom at its riphery to provide a restricted outlet, a heatinsulating plate above the covering plate for retarding vaporization ofcontents ot' the bowl, a wick adjacent the outlet, and means .fordirecting air over the wick to support combustion. j

In testimony whereof I aiiX my signature.

WILLIAM L. six,

